Originally Posted by Mark R Dobrenski
Could be wrong here but, I'd be for betting if it's doing some wonder work with the WSM (with good case life, the one thing to date not spoken of or worked thru) then I'd be for betting it'll do the same thing for the 300 Win.

One way or another there will still be the speed diff between the two is my opinion.

Dober


Mark, according to Alliant's data, it doesn't really boost the 300 WM http://www.alliantpowder.com/reload...ght=180&shellid=141&bulletid=189 ... apparently it was "formulated" specifically for the short mag case geometry, and that is where any increase in speed will be found.

I've seen a solid 50 - 100 fps increase in speed with 165, 180 and 200 grain bullets (depending). Not monumental, but since the powder is temp insensitive like H4350 and is giving slightly better groups and equally low ES's, what's not to like? http://www.alliantpowder.com/products/powder/reloder17.aspx

Not the Second Coming, but a real boon for 300 WSM shooters... was at the range most of the evening and re-confirmed my first impression. The stuff WORKS in the 300 WSM.

Tonight at the range:

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